Clipbord Firefox, Copy text to clipboard in firefox

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">


<script language="javascript" type="text/javascript">

function copy_clip(maintext)
{
 
 if (window.clipboardData)
   {
 
   // the IE-manier
   window.clipboardData.setData("Text", maintext);
 
   }
   else if (window.netscape)
   {
 
   netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
 
 
   var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
   if (!clip) return;
 
 
   var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
   if (!trans) return;
 
 
   trans.addDataFlavor('text/unicode');
 
 
   var str = new Object();
   var len = new Object();
 
   var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
 
   var copytext=maintext;
 
   str.data=copytext;
 
   trans.setTransferData("text/unicode",str,copytext.length*2);
 
   var clipid=Components.interfaces.nsIClipboard;
 
   if (!clip) return false;
 
   clip.setData(trans,null,clipid.kGlobalClipboard);
 
   }
   alert("Following info was copied to your clipboard:\n\n" + maintext);
   return false;
}

</script>


 
</HEAD>
 
<BODY>
<table border="1">
<tr>
<td>
<span onclick='return copy_clip(this.innerHTML)'>click here</span>
</td>
</tr>
</table>
</BODY>
</HTML>